N4-acetyl, n1-(p-iodophenyl) sulfanilamide



Patented Jan. 17, 1950 4 I I UNITED STATES PATENT OFFICE N -ACETYL, N (p-IODOPHENYL) SULFANILAMIDE Ramon de Montaner, Barcelona, Spain No Drawing. Application March 9, 1944, Serial No. 525,780. In Spain March 12, 1943 1 Claim. (Cl. 260397."|')

1 2 The therapeutic importance of the sulfonamide detail a preferred embodiment of the invention, compounds, i. e. the series beginning with sulfstarting from a benzene sulfo-halide: anilamide, is Well known. Equal parts of p-acetylaminobenzene sulfo- The object of the present invention is the prochloride and p-iodoaniline are dissolved in a suitvision of a new group or series of sulfa com- 45 able solvent, the solution being stirred and heated pounds, characterized by the association with the until the reaction is completed. As a result of various sulfamide moieties of iodine, whereby the this reaction, p-acetylamino-benzene sulfonamido curative value of the products is increased while iodobenzene is formed, and this is separated by toxicity is reduced. precipitation:

A further object of the invention is the pro- 50 vision of a process which consists essentially in s0101 NHz SO2NHC 'I combining a sulfamidic compound, such as paminobenzene sulfonamide or any of its halogenated derivatives, e. g. the p-aminobenzene sulfohalide, with iodine or an iodinated compound, it 55 being possible to use advantageously those iodinated derivatives which result from the introduc- NrLoocm I NH.C 0.011: tion of iodine into a benzene nucleus, e. g. id0- p-Acetylamino- Iodop-Acetylaminobenzene ginning benglefierisgelfoaniline v sulfonamido-iodobenzenc According to the present invention, the iodi- 60 mated compound to be combined with the This product s saponified by boiling with dilute sulfamide may also contain an amino group hydrochloric acid and the resultant products are Use may also be made in this regard of a benzene neutrahzed Wlth Soda producmg the new sulfo-halide which contains in para position a pound substituent which is convertible into an amino 5 SO NH I group, together or in admixture with an iodinated 2 a compound which contains an amino group.

The iodinated compound, for example iodoaniline, may be prepared as follows:

p-Aminobenzene sulfonamido-iodobenzene Nitration Similarly, the sodium salt 3 SOzNH Nncoorc NH.O 0.0113 Acetanilide p-Nitro-acetanilide l Sap unification S 0 aNa is obtained by the introduction of the -SOsNa Dlazotlzatlm group into the molecule, these compounds being v NaNOz-l-HOl characterized by their notable therapeutic properties, as they are perfectly tolerated by the human t N112 organism and have absolutely no poisonous Diazonium salt p-Nitraniline proper The foregoing example is Wholly exemplary in character and it will be understood that there may be introduced also those variations of detail or execution which do not alter the essential Iodination l I characteristics of the invention. Reduction I claim:

The compound of the formula Sn H01 01130 O.HN S OZNH-O I I I RAMON DE MONTANER.

p-Nitro iodoaniline Iodoaniline The following illustrative example sets forth in 41) (References on following page) 31 4 REFERENCES CITED OTHER, REFERENCES The following references are of record in the Seudi: Jour. Am. Chem. 800., vol. 59, pp. 1480- file of this patent: 1482 (1937).

UNITED STATES PATENTS 5 205513212) SJour. Am. Chem. 800., vol. 62, pp. 1999- Number Name Date Chem. Abstracts, vol. 35 (1941), page 2121.

1,975,160 Jordan Oct. 2, 1934 Long et aL: J. Am. Chem. 800., vol. 63, June 2,195,067 Weinand Mar. 26, 1940 1941, 537

2,248,911 Behniseh July 8, 1 1 10 Northey: The Sulfonamides and Allied Com- 2,323,455 Hultqulst Aug. 1943 pounds (1948) Reinhold Publishing 00., pp. 58, 

